/* 这是导航栏的样式 */
.nav {
    float: right;
    padding-right: 180px;
}

.nav li a {
    text-decoration: none;
}
.nav li a:hover {
    text-decoration: underline;
    cursor: pointer;
}

.nav .next-menu {
    padding-left: 15px;
    display: none;
    z-index: 100;
    position: relative;
}
.nav .next-menu li {
    width: 60px;
    height: 30px;
    line-height: 30px;
    list-style: none;
}
.nav .next-menu li a {
    color: #777;
}
.space:hover .next-menu {
    display: block;
    position: absolute;
}

.container {
    max-width: 1000px;
    margin-top: 25px;
    margin-bottom: 50px;
}
.left-nav {
    height: 500px;
    padding-left: 30px;
    background-color: #0084ff;
    background-color: rgba(0, 132, 255);
}
.left-nav h3 {
    color: #fff;
    font-weight: bold;
}
.left-nav .one {
    box-sizing: border-box;
    border-left: 2px solid #fff;
}
.left-nav .list-group-item {
    background-color: rgba(0, 0, 0, 0);
}
.left-nav li {
    border: 0px;
    height: 42px;
    margin-left: 0px ;
    color: #fff;
    font-size: 16px;
    text-decoration: none;
}
.left-nav li:hover {
    cursor: pointer;
}

iframe {
    padding-left: 30px;
}